PC Processors

[PDG888]

Hi All,

I have a PC everything working perfectly previously with a 9800X3D.

Just purchased a 9950X3D and now issues with C5 Boot code error.

PC Specs.

Gigabyte Aorus Master - Bios F4, Have tried Bios F5b with same issue

CPU - 9950X3D

G Skill Z5 ram 2 X 32gig are on the QVL list - F5-6000J3040G32GX2-TZ5RK

PC will boot with 1 stick of ram in A2, will not boot with 1 stick in B2

will not boot with A2 and B2 populated

Reseated ram numerous times, also reseated CPU, no bent pins.

Anyone else have the same issue or know of a fix ?

All help and info appreciated

[Tech4You]

I have a similar issue. 

R9 9950X3D was running fine, same RAM as you, with expo enabled. A day after, PC froze and after restart I got code 00, did a cmos reset, then got C5. Tried re-seating it, no changes. Put my 7900X3D in, wokring no problems. Using an Asus Strix X670E-E Gaming with the latest Bios version 2904

[Darth_Heretic]

Zero issues. Updated to latest BIOS on the MSI X670E BEFORE installing the chip with the 7950x3d installed, then installed the 9950x3d and setup the BIOS.

It's been boring ever since.

[jimmy200340]

Same issue on MSI X870e CARBON WIFI with 1A27 BIOS

both 9800X3D 9950X3D C5 error

9800X3D working fine with previous 1A23 beta bios. But 9950X3D with 1A23 bios also got C5 error

[PDG888]

Has anyone had any solutions to this as yet ???

[neikosr0x]

Disconnect the PC from the power entirely, remove the mobo battery wait 1 minute (try pressing the power button while disconnected) and then put the battery back an reconnect the PC to power and try if it works, this should work as a CMOS reset but "better".

[robsonbyte]

For me this does not work. Hopefully I can turn on the computer after clearing CMOS or press the button on the secure boot motherboard after several times and then I can restart the computer normally, including turning it off and on as long as it is done within about 5 minutes. If the computer stays more than this time off, I have to do this whole ritual again to be able to boot.

[PDG888]

ok, i will try this as you have described tomorrow morning and report back how it went, thanks for your reply

[robsonbyte]

I decided to calibrate the pressure of the screws in the CPU socket, now the PC turns on normally, even hours after being removed from the electrical power and connected again.